Or reducing mill



(No Mdel.) 4 sheets-sheet 1. J. A. PEER.

PULVEBIZING OR RBDUGING MILL. No. 462,277. Patented Nov. 3, 1891.

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(No Model.) -4 Sheets-heet 2. J. A. PEER. PULVBRIZING 0B. REDUGING MILL.

No. 462,277. Patented Nov. 3, 1891.

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4 Sheets-Sheet 3.

(No Model.)

J. A. PEER. PULVBRIZING 0R RBDUGING MILL.

No. 462,277. Patented Nov. 3, 1891.

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(No Model.) 4 Sheets-Sheet 4. J. A. PEER. PULVERIZING 0R REDUGING MILL.

DML-462,277. Patented Nov. 3, 1891.

INV NTUH 'W BY JM /f/J ATTORNEY WITNESSES:

UNITED STATES PATENT OEEICE.

.IOIIN A. PEER, OF BROOKLYN, ASSIGNORv OF ONE-HALF TO TIIEODORE IY. BAYAUD, OF NEIV YORK, N. Y.

PULVERIZING OR REDUCING MILL.

SPECIFICATION forming part of Letters Patent No. 462,277, dated November 3, 1891.

Application tiled November l0, 1890. Serial No. 370,977. (No model.) i

To @ZZ whoml it may concern:

Be it known that I, JOHN A. PEER, of Brooklyn, Kings county, and State of New York, have invented a certain new and useful Improvement in Pulverizing or Reducing Mills, of which the following is a specification.

This invention relates to machines for reducing barks, rosin, and similar material; and it consists in the construction and novel ar rangement of parts, as hereinafter set forth. I will describe a reducingmachine embodying my improvement, and then point out the novel features in the claims.

In the accompanying drawings, Figure l is an end view of a machine embodying my invention, partly in section on the line c: :c of Fig. 2. Fig. 2 is a side view. Fig. 3 is an edge view of a feeding-plate, partly in section on the line 'y y of Fig. 4L. Fig. t shows the lower side of the feeding-plate and its connections. Fig. 5 shows details of a swiveljoint employed. Fig. G is an end view thereof. Fig. 7 is a plan view of the mill. Fig. S is a section on the line .a a of Fig. l. Fig. 9 is a side view of a disk employed in the mill. Figs. l0, ll, l2, 13, 14, l5, 16, and 17 are detail views of mechanism employed in the mill. Fig. 18 is a sectional View, on an enlarged scale, of a portion of the machine.

Similar letters of reference indicate like parts in all the figures of the drawings.

Referring by letter to the drawings, A designates a casing having its lower portion rigidly secured to a base A. The casing A is circular in form and is preferably constructed in two sections d a', hinged together at one side, as at d2, and having a locking device d3 at its opposite side. By constructing the casing in two parts or sections it may be readily opened for the purpose of cleaning it or for arranging its internal mechanism.

A2 is a screen, here shown as formed in two semicircular sections and surrounded by a frame d4 and held in position within the casing A by seating the edge of the frame at into an annular groove d in the wall of the casing. It is evident that the screen-sections may be removed when the casing is opened, as before described.

B is a horizontal rotary driving-shaft extending through openings in the casing A and the screen A2 and having bearings b in brackets extending from the casing, to which they are attached by bolts or otherwise, and a band-pulley Z2 is secured to the shaft, as here shown, between one of the shaft-bearings and the casing. The shaft B is longitudinally adjustable in its bearings, and as a means for securing this longitudinal adjustment the shaft engages with a sliding block B in such manner that the shaft may rotate without imparting motion to the block. The sliding block B is made in two horizontal sections separably connected together by means of bolts or screws, and the said block slides in a yoke or way b2, attached to a bearing-bracket b, as shown.

Fig. 5 shows a means for engaging the shaft with the slidingblock,and by referring thereto it will be seen that the block has a series of annular ribs b3, adapted to engage in annular grooves b4 in the end of the shaft B. A pin b5, threaded at its outer end, has a swivel engagement with the sliding block B and passes loosely through an opening in the end of the yoke b2, where it is provided with a nut b(3 in the form of a hand-wheel. By rotating the nut b it is obvious that the shaft B may be adj usted longitudinally, and a j ain-nut Z" may be operated to secure the shaft as adjusted.

C designates beaters rotated with the shaft B within the casing A. The beaters are mounted on a support or disk C', which is rigidly mounted on the shaft A.

Referring to Figs. ll, 12, I3, and 1l, itwill be seen that the beaters C have an angular shank c, which engages in a corresponding opening through the disk C', so that the beaters will not turn, and a threaded portion c of the shank is engaged by a lock-nut c2. By means of the nut the beater may be tightly held in place, and to lock the nut a pin c3 may be driven through perforations in the nut and disk. The nuts project into the chamber be tween the disk C and the screen and serve as beaters to further reduce material in said chamber. It is preferable to removably secure the beaters to the disk, as described, as the beaters may then be turned to present a new surface should a surface become worn out by use. Two opposite sides of the beaters converge toward the free end and are pro-` vided with teeth or ribs c4, which are here shown as extending longitudinally, and it will be observed that there are two pairs of these beaters, one pair being somewhat smaller than the other, although there maybe a greater or less number of beaters without departing from the spirit of my invention.

Annular ribs D extend inwardly from a wall of the casing and project over and in line with the beaters C. I have shown these ribs as integral with a disk D', which is made in two sections and has its edge seated in an annular groove in the wall of the casing, similar to the screen A2. The inner surfaces of the ribs D are provided with transverse saw-shaped teeth or grinding-surfaces d, and the said ribs have a transverse pitch Vcorresponding to the incline of the ribbed surface of the beaters. It will be observed that by a longitudinal adjustment of the shaft B, as bey fore described, the ldistance between the ribs and the beaters may be increased or diminished to reduce materials to different degrees of fineness.

The bottom of the casing A is provided with two outlet-openings d d2, ar-

ranged one d2 between the beaters and the'y screen and the other d at the opposite side of the screen. These openings are provided with closing-slides d3. When it is desired not to reduce material to a fine powderor to screen it, the slide is withdrawn from the opening d2 and the opening d closed. If,

however, material is to be finely ground and screened, the slide is withdrawn from the,

.opening dand the opening d2 closed.

Brushes E are secured to the rear surface of the disk D. bly of steel wires so arranged as to bear upon the surface of the screen A2 in such manner as to force material through the screen.4

Scoops E are also secured to the disk D and serve to scoop o r scrape material from the bottom of the casing and return it to the beaters. l

I have not shown the brushes and scoops -in Fig. .1, as they would tend to confuse the iigure; but they are plainly show n in Figs. 9 and l0.

Having described the reducing mechanism, I will now describe the automatic feed mech,- anism employed therewith.

F designates a hopper secured by bolts or otherwise to the casing A and provided with a chute fnear its upper end. The outlet of the chute has an automatic closure in the form of a swinging door or plate f. I have shown thc plate as swinging in bearings in the top of the hopper; but it may be connected directly to the chute, if so desired. After material is placed in the hopper the closure, hy closing against the `chute-outlet, prevents the escape of powder or dust. An outlet f2 from the lower portion of the hopper communicates with an opening through the casing A, and the outlet f2 is provided with a slide F to regulate the degree of opening. The slide F has a shank f3 pass- These brushes are prefera-` ing through a perforation in a lug extending from the hopper, and a nut f4 on the threaded end of the shank f3 above the lug serves to raise or lower the slide.

G is an automatic feeder in the bottom of the hopper. This is Ashown as inclined and provided with transverse serrations g and as extending through a slot g in the wall of the hopper. A shank orbolt g2 projects from the feeder G through an opening in a bracket g3, where its threaded end is provided with a regulating-nut g4, and a coiled spring g5 surrounds the shank g2 between the bracket and the hopper, as shown.l

H is a worm on the shaft B, engaging with a worm-wheel H', having trunnions h, having bearings in brackets extending from the bottom of the hopper, and one of the trunnions is provided with a radial lug or striker h', which at every revolution of the worm-wheel H contacts with a boss h2, secu-red to the feeder G and extended through an opening in the bottom of the hopper. By this mechanism it is obvious that the feeder G will be forced backward by the rotation of the shaft B and returned or forced forward by the spring 'g5 when the striker h shall have rcleased or passed the boss h2.

Ilaving described my invention, what I desire to secure by Letters Patent is#- l. In a reducing-mill,the combination, with a casing having grinding-ribs, and a rotary shaft, of a disk mounted on said shaft and carrying beaters .and brushes, a screen upon which the brushes bear, the said casinghaving an outlet opening between Ythe beaters and the screen and another outlet-opening at'the opposite side of the screen, and closures for said outlets, substantially as specilied.

2. In a reducing-mill, the combination, with a casing having grinding ribs, and a rotary shaft, of a disk mounted on said shaft, beaters carried by the disk, brushes and scoops carried bythe disk, a screen upon which the brushes bear, the said casing having an outlet-opening arranged between the disk and the screen and another outlet-opening at .the

opposite side of the screen, and closures for said outlets, substantially as specified.

3. In a reducing-mill, the combination, with a casing made in two sections and having an annular groove, and a rotary shaft carrying beaters and brushes, of ascreen consisting of two parts, having a frame removably seated inthe annular groove of the casing, substantially as specified.

4t. In a'reducing-mill, the combination, with a casing, a screen therein, and a rotary shaft carrying a disk, of beaters having shank por tions extended through openings in the disk, and nuts on said shank portions locked to the disk and serving as beaters for material in a chamber between the disk and screen, substantially as specified.

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5. In a reducing-mill, the combination, with in, carried by the rotary shaft, a hopper having an outlet eominunioatingwith an opening in the easing, a feeder in the hopper, a boss on the lower side of the feeder, awornl-Wheel having a striker on its shaft, a Worm on the rotary shaft engaging with said Worm-Wheel for moving the feeder in one direction, and means for moving it in the opposite direction, substantially as specified.

6. In areduoing-mill, the combination, with a rotary shaft carrying beaters, and a easing made in two parts, of a screen consisting of two sections, having a frame seated in an annular groove in the easing, and a disk having projecting grinding-ribs and made-in two seor 5 tions and having its edge removably seated in an annular groove in the Wall of the easing, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of zo two subscribing Witnesses.

4 JOHN A. PEER.

Witnesses:

C. R. FERGUSON,

ANTHONY GREF. 

